A 28-year-old woman with untreated Graves disease is brought to the emergency department due to confusion, severe agitation, and a temperature of 39.4°C (103°F). Her heart rate is 145/min and blood pressure is 150/70 mm Hg. Physical examination reveals severe diaphoresis, a fine tremor, and a diffusely enlarged thyroid gland. She is diagnosed with a thyroid storm. Arrange the following management steps in the correct chronological sequence to safely and effectively treat this patient's condition.
- 1Administration of a beta-adrenergic blocker (e.g., propranolol)
- 2Administration of a thionamide (e.g., propylthiouracil)
- 3Administration of an iodine solution (e.g., potassium iodide)
- 4Definitive therapy with surgery or radioactive iodine
Answer
The correct sequence is: Beta-blocker, then Thionamide, then Iodine solution, and finally Definitive therapy.
The safe resolution of a thyroid storm requires a specific, stepwise pharmacologic blockade. Sympathetic overactivity is immediately blunted with a beta-blocker. Next, the synthesis of new hormone must be halted with a thionamide. Only after synthesis is completely blocked should an iodine solution be administered to stop the release of preformed hormone. Definitive surgical or radioactive therapy is reserved for the outpatient setting once the patient is stable.
Step-by-Step Solution
Key Concept
Pharmacologic sequence of thyroid storm management